potter



b an e L J R E T 0 P O a d o M 0 CYLINDER PRINTING MAGHINB.

lgwvam coz' Patented Oct. 23,1894.

:51, Ada

No Model.) I 2 Sheets-Sheet 2.

0. POTTER, Jr. CYLINDER PRINTING MAGHINE.

Paterited Oct. 23, 1894.

34mm box A guy 2% via, 3&3 attain m1 Unrrsn STATES ATENT Orrrcm CHARLES POTTER, JR, OF PLAINFIELD, NEW JERSEY, ASSIGNOR TO THE POTTER PRINTING PRESS COMPANY, OF SAME PLACE.

CYLINDER PRINTING-MACHINE iiPECIFICATION forming part of Letters Patent No. 527,880,dated October 23,1894. Application filed November 24, 1891. Serial No. 412.921. (No model.)

To all whom, it may concern:

Be it known that I, CHARLES POTTER, J r., of the city of Plainfield, county of Union, and State'of New Jersey; have invented certain new and useful Improvements in Cylinder Printing-Machines, fully set forth in the following description and represented in the accompanying drawings.

This invention relates generally to cylinder printing machines, and more particularly to the means for transmitting the proper recip rocations to-the form bed and for imparting timely vertical movements to the impression cylinder.

The object of the inventionamong other things is to materially simplify and render more certain in its operation the devices for converting the rotations of the driving shaft into the to and fro reciprocations of the form bed.

It also has for its object the improvement and simplification of the mechanism for raising and lowering the impression cylinder from and into its place of impression with the form bed. i

To this end the improvements consistin the novel structures and combinations of parts fully hereinafter set forth.

In the accompanyingdrawings, which illustrate apractical embodimentof the invention: Figure 1 is a side elevation partly in section of a two revolution cylinder press provided with the invention. Fig. 2, is a cross sectional elevation on the line 2 of Fig. 1, of a portion of the press. Fig. 3, is'a detailed elevation partly in section of a portion of the form bed, driving rack-bar and connected parts. Fig. 4, is a cross section of the same on the line 4, of Fig. 3. Figs. 5 and 6 are p'artial elevations and diagrams of the form bed, rack-bar and its driving pinions in different positions.

The invention is illustrated in connection with a two revolution cylinder press as representing a type of press to which the invention is applicable, it being obvious to those skilled in the art that it is equally adapted to other similar presses and to stop cylinder presses.

The press is contained by the usual side frame A supporting an impression cylinder 13,

delivery cylinder 0, feed board D and a form bed E. The form distributing ink rolls F are shown in diagram and other usual parts of the press not needed to a proper understanding of the invention are entirely omitted.

The press is provided with the usual driving shaft a, see Fig. 2, having fast and loose pulleys b, and a driving pinion c. This pinion meshes with an intermediate d, which in turn meshes with the impression cylinder gear e, and with the latter gear there meshes a gear on the delivery cylinder: shaft. Not shown.

The form bed E reciprocates to and fro beneath the impression cylinder on the usual guide ways 2', and in its forward movement in the direction of the arrow, Fig. 1, printing the sheet carried by the impression cylinder and on its return movement passes idly beneath the cylinder to repeat its forward move ment. The bed carries a rack-bar G that is supported from beneath by a pair of brackets f. This rack-bar is toothed upon its upper and lower surfaces l0, 12, which are continued in a circle around each of its ends 11, 13, so that a continuous toothed surface is provided. 'With this rack-bar Gthere constantly engages a pinion 14 that is mounted loosely on a stud 9 projecting from the inner side of a disk or piece 15 formed at the inner end of a sleeve 16, concentric with and surrounding the driving shaft a, and supported in suitable bearings in the frame-work.

The inner end of the driving shaft a, between the face of the rack-bar and the disk or piece 15, carries a pinion 8 that is also in constant mesh with the rack-bar pinion l t, the latter having a sufficiently wide face for this purpose. The disk also carries a pair of studs or anti-friction rolls 6, 7, projecting from its inner face at diametrically opposite points and ninety degrees upon each side of the rack-bar pinion 14. These studs 6, 7, are adapted to engage with a longitudinal guide way or slot 17, formed along the outer face of the rack bar G by a pair of upper and lower strips 18, which terminate near each end. of the rack-bar in outwardly inclined or flaring ends 5 which thus make the guide way open ended so that the studs of the disk may pass from and enter the guideway as the rack-bar pinion 14 travels around each of the rack-bar n ends 11, 13, the teeth of the pinion being partially cut away as at 14 to pass said strips.

At each end of the rack-bar G, secured thereto or preferably to extensions from the brackets f, there is a head providing a segmental guide-way 19, 20, each of said guide- Ways being concentric with the pitch line of the teeth around the ends 11, 13, of the rackbar G and in line with the axis of the rackbar pinion 14, and coincide with the path of movement of said pinion in the revolution of the disk. The stud 9 projects beyond the pinion 14 with an anti-friction roll adapted to enter and travel along each of said segmental guideways, as the rack-bar and the bed arrive and leave the end of their movements in each direction.

In the operation of the parts thus far described, it Will be understood that while the rack-bar pinion 14 is in engagement with either of the horizontal portions 10, 12, of the rack-bar G, the disk or piece 15 carrying the pinion 14 will be locked against rotation by the engagement of its studs 6, 7, with the guideway 17; and as the pinion approaches and meshes with the toothed circular ends 11, 13, of the rack-bar the studs will leave the guideway thereby permitting the disk or piece 15, to rotate on its axis and carry the pinion guided by the engagement of its stud with the segmental guideway 19, 20, around from one side of the rack-bar to the opposite side, when the studs of the disk or piece again enter the guideway 17 to lock the disk against rotation during the travel of the horizontal portion of the rack-bar in meshing with the pinion until the opposite end of the rack-bar arrives adjacent said pinion 14 when a similar operation will occur. Assuming the parts to be in the position shown in Figs. 3 and 4, the disk is locked against rotation and through the rotation of the driving shaft a, the rack-bar pinion 14, being thereby rotated, will drive the rack-bar and bed in the direction of the arrow 1, and thus moving the bed in its idle return movement. Just before the bed and rack-bar arrive at the limit of their movement in this direction, the forward stud 6 has left the guideway 17 and the projecting end of the pinion stud 9 has entered the segmental guideway 19 and the disk or piece 15 carryingthe rack-bar pinion is now free to rotate in the direction of the arrow Fig. 5, thereby moving the studs out of horizontal alignment with the guide-way 17, the stud 7 following the inclined or flared end 5 of the lower guide strip 18. 'During this movement of the disk and its further movement, until it has made a complete onehalf revolution, the rack-bar pinion 14 is rotating in mesh with the toothed circular end 11 of the rack-bar thereby moving that rack-bar and the bed first gradually to the limit of its movement in the direction of the arrow, Fig. 5,into the position shown in Figs. 1 and 2. Continuing its rotation, the rackbar pinion gradually starts the rack-bar and the bed in the opposite direction,its projecting stud still being confined within the segmental guideway 19, and the disk or piece 15 continuing to revolve, so that in the position shown in Fig. 6, the stud 6 has been brought against the inclined or flared end 5 of the upper guide strip 18, and a slight further rotation brings the studs 6 and 7 in alignment with the guideway 17, with the stud 6 entered in said guideway as the rack-bar pinion arrives on the lower straight portion of the rackbar with its projecting stud 9 out of the segmental guideway 19. The rack-bar pinion now having left the toothed circular end of the rack-bar, the latter and the bed will resume their normal speed in the direction of the arrows 2, Fig. 6, until the opposite end of the rack-bar arrives adjacent said pinion when their speed will be gradually reduced as the rack-bar pinion rotates around'that end of the rack-bar, and again gradually increased in speed until it resumes its normal speed in moving in the return movement, the one half revolution of the disk orpiece 15 taking place as before and being again lockedin its changed position by its studs entering the guideway 17.

The remaining part of the invention relates to the means for raising and lowering the impression cylinder B from and into the plane of impression with the bed E.

The shaft of the impression cylinder is journaled at its opposite ends in boxes 30 which are adapted to slide vertically in a guideway formed in the opposite side frames of the machine. Each of the boxes 30-only one being shown as the devices upon the opposite side of the machine are duplicates, with the exception of the driver as is well known-is seated on the end of a vertical rod 31 mounted in bearings in the framework, the lower end of which is in turn seated upon a pair of springs 32, and just above this end the rod is provided with a screw that is engaged by a screw-nut 33 confined in an opening in the framework and bearing the pinion 34. This pinion is engaged by a rack-bar 35, that is connected by a link 36 with the upper end of a vibrating arm 37; and the arm is connected with a cross shaft 38 mounted on pivot studs between the two side frames and at its opposite side bearing a similar vibrating arm for connection with the similar devices on that side of the machine. The parts thus far described need not be shown in more detail or further explained as they are of well known construction and fully illustrated and described in Letters Patent Nos. 274,558 and 413,491, to which reference may be had. Instead, however, as in said patents of depending upon the proper and timely vibrations of the arms by a pair of cams on a cross shaft with connecting bevel gears and shaft for taking the motion from the driving shaft, such vibrations are taken from aneccentric having periodical movements to impart at the proper time required vibrations to has a. strap 41 connected through a rod 42 with one of the vibrating arms 37.

The means for causing the periodical rotations of the sleeve and disk have been already fully described, and such rotations will consequently be imparted to the eccentric thereby vibrating the lever 37 first in one direction and then in the opposite direction. Thus during the time the bed and its rack-bar are reciprocating with the studs 6 and 7 within the guideway 17, the eccentric will remain stationary with the impression cylinder either raised out of the plane of impression or down in said plane. When, however, the rackbar pinion is traveling around the toothed circular end of the rack-bar and the disk is being revolved, the eccentric is correspondingly moved, and upon completing a one-half revolution is locked against movement as by the engagement of the studs 6 and 7 with the guideway 17 which act as a lock for the cocentric, until the opposite end of the rack-bar arrives at the pinion 14 when another one" half revolution is imparted to the eccentric, and so on alternately raising and lowering the impression cy1inder,raising said cylinder while the pinion is rotating around the toothed end 13 of the rack-bar and lowering it when that pinion is rotating round the toothed end 11 of the rack-bar. 7

From the foregoing it will be seen that an exceedingly simple means is provided for raising and lowering the impression cylinder, and that "after each movement it is locked in its changed position without danger of ever moving out of time so far as its co-operation with the form is concerned. It is also apparent that this structure while illustrated with a single cylinder machine, is equally applicable to a double cylinder machine in which both of the impression cylinders are raised and lowered from and into the plane of impression.

What is claimed is- 1. The combination with the impression cylinder, form-bed and its toothed rackbar, of a driving pinion, a disk or piece carrying an intermediate pinion meshing with the pinion and rack-bar, a guideway parallel with the rack-bar and an engaging stud or studs carried by said disk, substantially as described.

2. The combination with the impression cylinder, form-bed and its rack-bar carrying a horizontal guideway and asegmental guideway at each end, of a driving pinion, a disk or piece carrying an intermediate pinion meshing with said pinion and rack-bar and having a projection for engaging each of the segmental guideways, and two studs on the disk engaging thehorizontal guideway, substantially as described.

3. The combination with the toothed rackbar carrying an open ended guideway with inclined ends and centrally disposed with relation to said rack-bar, of a driving pinion, a disk carrying an intermediate pinion meshing with said pinion and rack-bar and also having studs engaging with the guideway in both reciprocations of the rack-bar, substantially as described.

4. The combination with the toothed rackbar carrying on its sidea pair of strips forming a horizontal guideway between them, of a driving pinion, a disk carrying an intermediate pinion meshing with said pinion and rack-bar and having a cut away portion to escape the pair of strips, and a pair of studs carried by the disk for engaging with the guideway, substantially as described.

5. The combination with the type bed and its toothed rack-bar, of a driving pinion,a disk carrying an intermediate pinion meshing with the pinion and rack-bar, a guideway, an engaging stud or studs carried by said disk, an eccentric carried with the disk and connections between the eccentric and impression cylinder for raising and lowering the latter, asset forth.

In witness whereof I have signed my name, in the presence of two witnesses, this 20th day of November, 1891.

CHARLES POTTER, J R.

Witnesses:

A. T. GALLUP, F. H. SMITH. 

